Internet Engineering Task Force (IETF) R. Stewart
Request for Comments: 6525 Adara Networks
Category: Standards Track M. Tuexen
ISSN: 2070-1721 Muenster Univ. of Appl. Sciences
P. Lei
Cisco Systems, Inc.
February 2012
Stream Control Transmission Protocol (SCTP) Stream Reconfiguration
Abstract
Many applications that use the Stream Control Transmission Protocol
(SCTP) want the ability to "reset" a stream. The intention of
resetting a stream is to set the numbering sequence of the stream
back to 'zero' with a corresponding notification to the application
layer that the reset has been performed. Applications requiring this
feature want it so that they can "reuse" streams for different
purposes but still utilize the stream sequence number so that the
application can track the message flows. Thus, without this feature,
a new use of an old stream would result in message numbers greater
than expected, unless there is a protocol mechanism to "reset the
streams back to zero". This document also includes methods for
resetting the transmission sequence numbers, adding additional
streams, and resetting all stream sequence numbers.
Status of This Memo
This is an Internet Standards Track document.
This document is a product of the Internet Engineering Task Force
(IETF). It represents the consensus of the IETF community. It has
received public review and has been approved for publication by the
Internet Engineering Steering Group (IESG). Further information on
Internet Standards is available in Section 2 of RFC 5741.
Information about the current status of this document, any errata,
and how to provide feedback on it may be obtained at
http://www.rfc-editor.org/info/rfc6525.
Stewart, et al. Standards Track [Page 1]RFC 6525 SCTP Stream Reconfiguration February 2012Copyright Notice
Copyright (c) 2012 IETF Trust and the persons identified as the
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Table of Contents
1. Introduction ....................................................3
2. Conventions .....................................................4
3. New Chunk Type ..................................................4
3.1. RE-CONFIG Chunk ............................................5
4. New Parameter Types .............................................6
4.1. Outgoing SSN Reset Request Parameter .......................7
4.2. Incoming SSN Reset Request Parameter .......................8
4.3. SSN/TSN Reset Request Parameter ............................9
4.4. Re-configuration Response Parameter .......................10
4.5. Add Outgoing Streams Request Parameter ....................12
4.6. Add Incoming Streams Request Parameter ....................13
5. Procedures .....................................................14
5.1. Sender-Side Procedures ....................................14
5.1.1. Sender-Side Procedures for the RE-CONFIG Chunk .....14
5.1.2. Sender-Side Procedures for the Outgoing SSN
Reset Request Parameter ............................15
5.1.3. Sender-Side Procedures for the Incoming SSN
Reset Request Parameter ............................16
5.1.4. Sender-Side Procedures for the SSN/TSN
Reset Request Parameter ............................17
5.1.5. Sender-Side Procedures for the Add Outgoing
Streams Request Parameter ..........................17
5.1.6. Sender-Side Procedures for the Add Incoming
Streams Request Parameter ..........................17
5.1.7. Sender-Side Procedures for the
Re-configuration Response Parameter ................18
Stewart, et al. Standards Track [Page 2]RFC 6525 SCTP Stream Reconfiguration February 2012
5.2. Receiver-Side Procedures ..................................18
5.2.1. Receiver-Side Procedures for the RE-CONFIG Chunk ...18